Double the Winchesters, double the fun! Sam and Dean are once again on the FBI's "Most Wanted" list when two Leviathans clone the brothers and go on a killing spree. The subject of a nationwide manhunt, Sam and Dean need to drop off the grid allowing Bobby to send them to Frank Deveraux (guest star KEVIN R. MCNALLY), a quirky surveillance expert, for help. Meanwhile, Bobby continues to search for a way to kill the Leviathans - or at least slow them down - so the real Winchesters can stop their evil doppelgangers.